Electric vehicle charging pile with joint suspension device

Abstract

The invention discloses an electric vehicle charging pile with a connector suspension device, and relates to the technical field of electric vehicle charging piles, the electric vehicle charging pile comprises a base piece, a protective shell and a shielding protective plate, the protective shell is fixedly connected to the top of the base piece, the shielding protective plate is fixedly connected to the side wall of the protective shell, and an electric gun jack piece is fixedly connected to the top of the inner cavity wall of the protective shell; the first assembly and the second assembly are arranged in the protective shell, and the triangular channel is designed into two inclined grooves and one vertical groove, so that the first assembly for fastening the electric gun plug can be indirectly moved from the outside of the protective shell to the inside of the protective shell, and under the action of the vertical groove of the triangular channel, the electric gun plug can be tightly fixed on the first assembly. In addition, the electric gun plug can be automatically aligned with the electric gun jack piece during storage, it can be guaranteed that the electric gun plug is aligned with the electric gun jack piece, vertical plugging action is carried out, the situation that the electric gun plug collides with or scrapes a socket of the electric gun jack piece, and the equipment structure is damaged can be effectively avoided, and the plugging completeness during storage is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle charging piles, and in particular to an electric vehicle charging pile with a joint hanging device. Background Art

[0002] With the increasing popularity of electric vehicles, charging piles, as important supporting facilities for electric vehicles, have attracted much attention for their convenience and safety. After charging, existing car charging piles usually use a fixed method of plugging the stun gun plug into a socket of a specific size. However, the existing method of plugging and fixing the stun gun plug has shortcomings in terms of operational convenience, fixing firmness, adaptability, etc., and it is difficult to meet the growing demand for electric vehicle charging.

[0003] In actual operation, when the user inserts the electric gun plug back into the charging pile, he needs to carefully align it with the socket. This process is particularly difficult in conditions such as poor lighting and inconvenient hand operation. It is not only time-consuming, but also easy to cause collision and scratching between the electric gun plug and the socket interface due to misinsertion, damaging the device structure and affecting its service life.

[0004] Moreover, in terms of external factors; simple plug-in is fixed by friction, which is not firm. When the charging pile is hit by external force or the charging line is pulled, the plug of the electric gun is easy to fall off and hit the vehicle or pedestrians, posing a safety hazard; during the charging process, slight vibration of the vehicle or charging pile can also loosen the plug, affecting the charging efficiency or even interrupting the charging and damaging the battery;

[0005] In addition, in terms of weather factors; since the size of the socket is fixed, it has poor compatibility with stun gun plugs of non-standard specifications or size deviations. At the same time, in an environment with large temperature changes, the stun gun plug and the charging pile socket will have connection problems due to thermal expansion and contraction, such as the plug expanding and being difficult to pull out in the summer or shrinking and not being tightly connected in the winter.

[0006] Therefore, an electric vehicle charging pile with a connector hanging device is proposed to solve the above problems. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an electric vehicle charging pile with a connector hanging device to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric vehicle charging pile with a joint hanging device, comprising: a base member, a protective shell, and a shielding protective plate, wherein the protective shell is fixedly connected to the top of the base member, the shielding protective plate is fixedly connected to the side wall of the protective shell, an electric gun socket member is fixedly connected to the top of the inner cavity wall of the protective shell, a first component and a second component are arranged in the protective shell, and the first component is located on one side of the second component;

[0009] The first component adaptably fastens the plug connector in a hanging manner and improves its convenience during use;

[0010] The second component is used to provide safety protection for the plug connector and prevent it from being scratched and damaged when it is plugged in only in a plug-in manner.

[0011] As an improvement, the first component includes a main body shell, the bottom of the main body shell is provided with sliding grooves at equal intervals, a sliding rod is slidably connected in the sliding groove, and a fastener is fixedly connected to the top of the sliding rod.

[0012] As an improvement, an adjustment ring is rotatably connected in the main body shell, a hexagonal groove is provided at the bottom of the adjustment ring, the top of the fastener is slidably connected in the hexagonal groove, an electrically controlled rotating part is fixedly connected to the top of the main body shell, a telescopic connecting rod is fixedly connected to the top of the electrically controlled rotating part, a cylindrical rod is fixedly connected to the outer end of the telescopic connecting rod, and the bottom of the cylindrical rod is fixedly connected to the adjustment ring.

[0013] As an improvement, the second component includes a fixing rod fixedly connected to the inner wall of the protective shell, one end of the fixing rod away from the fixing position of the protective shell is fixedly connected to a triangular piece, and a triangular groove is opened on the triangular piece.

[0014] As an improvement, a driving shaft is fixedly connected to the middle of the triangular member, a U-shaped plug-in member is fixedly connected to the end of the driving shaft, a sliding member is slidably connected in the triangular groove, the U-shaped plug-in member is movably clamped on the sliding member, and a transverse connecting rod is rotatably connected to the outer end of the sliding member.

[0015] As an improvement, a vertical cavity is fixedly connected to one side of the triangle, and an auxiliary supporting member is vertically slidably connected to the vertical cavity.

[0016] As an improvement, a convex piece is fixedly connected to the middle of the driving shaft, a piston piece is fixedly connected inside the triangular piece, a connecting pipe is fixedly connected to the top of the piston piece, and a cleaning ring with a hole is fixedly connected to the end of the connecting pipe away from the piston piece.

[0017] As an improvement, the fastener includes a fastening plate and a sliding block fixedly connected to the upper end surface, and silicone is provided on one side of the fastener for fastening the electric gun plug.

[0018] As an improvement, the triangular groove includes two oblique grooves and one vertical groove, the perforated cleaning and blowing ring is of cavity design, and a through hole is opened on the inner side wall of the perforated cleaning and blowing ring, and the through hole is connected with its inner cavity.

[0019] Compared with the prior art, the present invention provides an electric vehicle charging pile with a connector suspension device, which has the following beneficial effects:

[0020] 1. The present invention can adaptably fasten the stun gun plug in a hanging manner through the design of the first component, and improve its convenience during use; specifically, quick clamping: the design of the adjustable clamping ring can be automatically adjusted according to the actual shape and size of the stun gun plug; when the user is finished charging, there is no need to perform precise alignment like the traditional plug-in method, just move the stun gun plug close to the clamping ring, and the clamping ring will quickly adapt and clamp the stun gun plug; this process greatly shortens the operation time, improves the efficiency of the charging process, and allows users to more conveniently complete the fixing operation of the stun gun plug without the need for coordinated operation of both hands, which greatly improves the convenience and flexibility of operation;

[0021] Increased fastening force: The design of the adjustable clamping ring enables the fastener to tightly wrap the stun gun plug, providing reliable fastening force; compared with the traditional plug-in method that relies solely on friction, the clamping ring's fastening method is more reliable. Whether the charging pile is accidentally hit by the outside world or the charging cable is accidentally pulled, the stun gun plug can be firmly fixed on the charging pile, effectively avoiding safety accidents that may be caused by the stun gun plug falling off.

[0022] 2. The present invention can effectively provide safety protection for the electric gun plug and perform cleaning and maintenance through the design of the second component, and can effectively prevent scratch damage that occurs when it is plugged in only by plugging in. Specifically, physical damage prevention: In the existing plug-in mode, the electric gun plug is usually exposed when not in use, and is susceptible to physical damage such as external collision, trampling or crushing; the newly designed device can store the electric gun plug in the protective shell to prevent it from being directly exposed to the external environment, thereby effectively preventing physical damage; and storing the electric gun plug can provide it with a relatively closed environment, reducing the erosion of the plug connector by rain, dust, etc. For some environments with corrosive gases or substances, storage can also play an isolation role to protect the plug connector from damage;

[0023] At the same time, it has the function of automatic plugging after cleaning, which can effectively prevent the accumulation of dust and oxides on the surface of the electric gun plug. If it is not cleaned and directly plugged in, the resistance will increase, resulting in increased heat during charging, affecting the charging efficiency and causing damage to the equipment. This improves the charging efficiency and stability and enhances the safety of equipment use.

[0024] 3. The present invention designs the triangular groove into two oblique grooves and one vertical groove. In addition to being able to indirectly move the first component that fastens the stun gun plug from the outside of the protective shell to the inside of the protective shell, the vertical groove of the triangular groove can also automatically align the stun gun plug with the stun gun socket when stored, which can effectively ensure the alignment of the stun gun plug and the stun gun socket and perform vertical plug-in action, effectively avoiding collision or scratching between the stun gun plug and the socket of the stun gun socket, thereby damaging the equipment structure and improving the perfection of the plug-in during storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the appearance diagram of the main structure of the present invention;

[0026] Figure 2 This is a diagram of the relevant structure of the protective shell after cutting;

[0027] Figure 3 For the present invention Figure 2 A magnified view of the structure at center;

[0028] Figure 4 For the present invention Figure 2 A magnified view of the structure at B in the middle;

[0029] Figure 5 This is a disassembled diagram of the main structure of the first component of the present invention;

[0030] Figure 6 It is a bottom view of the main structure of the first component of the present invention;

[0031] Figure 7 This is a working state diagram of the second component of the present invention;

[0032] Figure 8 It is a side view of the appearance of the present invention.

[0033] In the figure:

[0034] 1. Base; 21. Protective shell; 22. Shielding protection plate; 3. Electric gun socket;

[0035] 4. First component; 41. Main body shell; 42. Sliding groove; 43. Sliding rod; 44. Fastener; 45. Adjusting ring; 46. Hexagonal groove; 47. Electric control rotating part; 48. Telescopic connecting rod; 49. Cylindrical rod;

[0036] 5. Second component; 51. Fixed rod; 52. Triangular member; 53. Triangular groove; 54. Driving shaft; 55. U-shaped plug-in member; 56. Sliding member; 57. Transverse connecting rod; 58. Vertical cavity; 59. Auxiliary supporting member; 510. Lug; 511. Piston member; 512. Connecting pipe; 513. Cleaning ring with holes. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0039] Example

[0040] Please refer to Figures 1 to 3 , Figure 5 , Figure 6 As shown:

[0041] In order to solve the problems mentioned in the technical solution, the embodiment of the present application provides an electric vehicle charging pile with a joint hanging device, including: a base member 1, a protective shell 21, and a shielding protective plate 22, wherein the protective shell 21 is fixedly connected to the top of the base member 1, the shielding protective plate 22 is fixedly connected to the side wall of the protective shell 21, and the top of the inner cavity wall of the protective shell 21 is fixedly connected with an electric gun socket member 3, the electric gun socket member 3 is used to adapt the electric gun plug, and after charging is completed, the electric gun plug needs to be plugged and aligned into the electric gun socket member 3, and a first component 4 and a second component 5 are arranged in the protective shell 21, and the first component 4 is located on one side of the second component 5;

[0042] The first component 4 adaptably fastens the plug connector in a hanging manner and improves its convenience during use; the first component 4 includes a main body shell 41, a through hole for plugging in the electric gun plug is opened on the main body shell 41, an arc-shaped through groove for adapting the rotation of the adjustment ring 45 is opened on the side, and a sensor is arranged at the main body shell 41. When the electric gun plug is plugged into the through hole of the main body shell 41, the sensor will enable the main controller to control the movement of the corresponding parts, and sliding grooves 42 are equidistantly opened at the bottom of the main body shell 41, and a sliding rod 43 is slidably connected in the sliding groove 42, and the sliding rod 43 is adapted to the sliding groove 42. A fastener 44 is fixedly connected to the top of the sliding rod 43, and the fastener 4 4 comprises a fastening plate and a slider fixedly connected to the upper end surface, and a fastener 44 is provided with silicone on one side of the fastening electric gun plug to prevent the electric gun plug from being damaged during adaptive clamping. An adjusting ring 45 is rotatably connected in the main body shell 41, and a through hole for plugging the electric gun plug is provided on the adjusting ring 45. A hexagonal groove 46 is provided at the bottom of the adjusting ring 45. The top of the fastener 44 is slidably connected in the hexagonal groove 46. An electric control rotating member 47 is fixedly connected to the top of the main body shell 41, and a telescopic connecting rod 48 is fixedly connected to the top of the electric control rotating member 47. A cylindrical rod 49 is fixedly connected to the outer end of the telescopic connecting rod 48, and the bottom of the cylindrical rod 49 is fixedly connected to the adjusting ring 45.

[0043] For further examples, please refer to Figures 2 to 4 , Figure 7 , Figure 8 As shown:

[0044] The second component 5 is used to provide safety protection for the plug connector and avoid scratches and damage that may occur when it is plugged in only by plugging in; the second component 5 includes a fixed rod 51 fixedly connected to the inner wall of the protective shell 21, and one end of the fixed rod 51 away from the fixed position of the protective shell 21 is fixedly connected to a triangular piece 52, and a triangular groove 53 is opened on the triangular piece 52, and the triangular groove 53 includes two oblique grooves and a vertical groove, and a driving shaft rod 54 is fixedly connected to the middle of the triangular piece 52, and a U-shaped plug-in piece 55 is fixedly connected to the rod end of the driving shaft rod 54, and a sliding piece 56 is slidably connected in the triangular groove 53. The U-shaped plug-in piece 55 and the sliding piece 56 are used in combination, and the U-shaped plug-in piece 55 can drive the sliding piece 56 to move in the triangular groove 53 when rotating with the driving shaft rod 54 as the rotation axis, and the U-shaped plug-in piece 55 is movably connected to the sliding piece On the moving part 56, the outer end of the sliding part 56 is rotatably connected to the transverse connecting rod 57, and a vertical cavity 58 is fixedly connected to one side of the triangular part 52. An auxiliary supporting part 59 is vertically slidably connected in the vertical cavity 58. The auxiliary supporting part 59 is used to assist its movement and stability when the transverse connecting rod 57 moves. A convex piece 510 is fixedly connected to the middle part of the driving shaft 54, and a piston part 511 is fixedly connected inside the triangular part 52. The piston part 511 includes a piston shell, a piston push rod, a return spring body, an air inlet hole and a one-way valve plate, which is mainly used to transfer gas to the connecting pipe 512. The top of the piston part 511 is fixedly connected to the connecting pipe 512, and the end of the connecting pipe 512 away from the piston part 511 is fixedly connected to a perforated cleaning ring 513. The perforated cleaning ring 513 is designed as a cavity, and a through hole is opened on the inner side wall of the perforated cleaning ring 513, which is connected to its inner cavity.

[0045] Everything in the above example works like this:

[0046] In the initial state:

[0047] The sliding member 56 is located in the oblique groove of the triangular groove 53 , the first assembly 4 is located outside the protective shell 21 , and the electrically controlled rotating member 47 is not started.

[0048] The following is the working process of the first component 4:

[0049] During use, when the charging personnel has finished charging, they only need to plug the electric gun plug from the main body shell 41 and the openings on the adjustment ring 45 from bottom to top. At this time, the main controller will control the electric control rotating part 47 to start. During the rotation of the electric control rotating part 47, the electric control rotating part 47 will drive the adjustment ring 45 to rotate in the main body shell 41 through the telescopic connecting rod 48 and the cylindrical rod 49; further, during the rotation of the adjustment ring 45, since the top of the known fastener 44 is slidably connected to the hexagonal groove 46 opened on the adjustment ring 45, when the adjustment ring 45 rotates, the fastener 44 will move in the hexagonal groove 46; further, since the sliding rod 43 at the bottom of the known fastener 44 is slidably connected to the sliding groove 42 opened at the bottom of the main body shell 41, therefore, under the two restrictions described above, the sliding The fastener 44 in the hexagonal groove 46 will gradually approach the stun gun plug inserted into the opening of the main body shell 41, thereby finally fastening it; that is, through the design of the first component 4, the stun gun plug can be adaptively fastened in a hanging manner, and its convenience during use can be improved; specifically, quick clamping: the design of the adjustable clamping ring can automatically adjust according to the actual shape and size of the stun gun plug; when the user is finished charging, there is no need to perform precise alignment like the traditional plug-in method, just move the stun gun plug close to the clamping ring, and the clamping ring will quickly adapt and clamp the stun gun plug; this process greatly shortens the operation time, improves the efficiency of the charging process, and allows users to complete the fixing operation of the stun gun plug more conveniently without the need for the coordinated operation of both hands, which greatly improves the convenience and flexibility of operation;

[0050] Furthermore, it can provide effective fastening force: the design of the adjustable clamping ring enables the fastener 44 to tightly wrap the stun gun plug, providing reliable fastening force; compared with the traditional plug-in method that only relies on friction, the fastening method of the clamping ring is more reliable, whether the charging pile is accidentally hit by the outside world or the charging cable is accidentally pulled, the stun gun plug can be firmly fixed on the charging pile, effectively avoiding safety accidents that may be caused by the stun gun plug falling off.

[0051] Please refer to the above working process Figures 1 to 3 , Figure 5 , Figure 6 .

[0052] The following is the working process of the second component 5:

[0053] Furthermore, when the first component 4 has fastened the electric gun plug, the driving shaft 54 ​​will rotate under the control of the main controller. As the driving shaft 54 ​​rotates, the U-shaped plug-in member 55 fixedly connected to the driving shaft 54 ​​will slide with the sliding member 56 that is slidably connected to the triangular groove 53 in the triangular groove 53. During this period, the sliding member 56 will move with the fixedly connected transverse connecting rod 57, and the auxiliary supporting member 59 in the vertical cavity 58 on one side of the triangular member 52 assists the movement of the transverse connecting rod 57 in the clamping, thereby Next, as the sliding member 56 moves with the transverse connecting rod 57 in the oblique groove of the triangular groove 53 to the vertical groove, the first component 4 fixedly connected to the transverse connecting rod 57 will be transferred from the outside of the protective shell 21 to the inside of the protective shell 21, and at this time, as the sliding member 56 moves in the vertical groove of the triangular groove 53, the electric gun plug fastened on the first component 4 will be in a state of vertical alignment with the electric gun socket 3, and as the sliding member 56 moves in the vertical groove of the triangular groove 53, the electric gun plug will eventually be plugged into the electric gun socket 3, thereby completing the storage and plugging work;

[0054] Furthermore, through the design of the second component 5, the safety protection of the electric gun plug can be effectively provided, and cleaning and maintenance can be performed, and at the same time, it can effectively prevent scratch damage that occurs when it is plugged in only by plugging in. Specifically, physical damage can be prevented: in the existing plug-in mode, the electric gun plug is usually exposed when not in use, and is susceptible to physical damage such as external collision, trampling or crushing; the newly designed device can store the electric gun plug in the protective shell 21 to prevent it from being directly exposed to the external environment, thereby effectively preventing the occurrence of physical damage; and storing the electric gun plug can provide it with a relatively closed environment, reducing the erosion of the plug connector by rain, dust, etc. For some environments with corrosive gases or substances, storage can also play an isolation role to protect the plug connector from damage;

[0055] At the same time, it has the function of automatic plugging after cleaning, which can effectively prevent the accumulation of dust and oxides on the surface of the electric gun plug. If it is not cleaned and directly plugged in, the resistance will increase, resulting in increased heat during charging, affecting the charging efficiency and causing damage to the equipment. This improves the charging efficiency and stability and enhances the safety of equipment use.

[0056] Furthermore, by designing the triangular groove 53 into two oblique grooves and one vertical groove, in addition to being able to indirectly move the first component 4 that fastens the stun gun plug from the outside of the protective shell 21 to the inside of the protective shell 21, under the action of the vertical groove of the triangular groove 53, the stun gun plug can also be automatically aligned with the stun gun socket 3 when stored, which can effectively ensure the alignment of the stun gun plug and the stun gun socket 3 and perform vertical plug-in action, which can effectively avoid collision or scratching between the stun gun plug and the stun gun socket 3 at the socket, thereby damaging the equipment structure and improving the perfection of the plug-in during storage.

[0057] Please refer to the above working process Figures 2 to 4 , Figure 7 , Figure 8 .

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric vehicle charging pile with a connector suspension device, comprising: A base member (1), a protective shell (21), and a shielding protective plate (22), wherein the protective shell (21) is fixedly connected to the top of the base member (1), and the shielding protective plate (22) is fixedly connected to the side wall of the protective shell (21), characterized in that an electric gun socket member (3) is fixedly connected to the top of the inner cavity wall of the protective shell (21), and a first component (4) and a second component (5) are arranged in the protective shell (21), and the first component (4) is located on one side of the second component (5); The first component (4) adaptably fastens the plug connector in a hanging manner and improves its convenience during use; The second component (5) is used to provide safety protection for the plug connector and prevent it from being scratched and damaged when it is plugged in only in a plug-in manner.

2. The electric vehicle charging pile with a connector suspension device according to claim 1, characterized in that: The first component (4) comprises a main body shell (41), the bottom of the main body shell (41) is provided with sliding grooves (42) at equal intervals, a sliding rod (43) is slidably connected in the sliding groove (42), and a fastener (44) is fixedly connected to the top of the sliding rod (43).

3. The electric vehicle charging pile with a connector suspension device according to claim 2, characterized in that: An adjusting ring (45) is rotatably connected in the main body shell (41), a hexagonal groove (46) is provided at the bottom of the adjusting ring (45), the top of the fastener (44) is slidably connected in the hexagonal groove (46), an electrically controlled rotating part (47) is fixedly connected to the top of the main body shell (41), a telescopic connecting rod (48) is fixedly connected to the top of the electrically controlled rotating part (47), the outer end of the telescopic connecting rod (48) is fixedly connected to a cylindrical rod (49), and the bottom of the cylindrical rod (49) is fixedly connected to the adjusting ring (45).

4. The electric vehicle charging pile with a connector suspension device according to claim 1, characterized in that: The second component (5) comprises a fixing rod (51) fixedly connected to the inner wall of the protective shell (21), one end of the fixing rod (51) away from the fixing position of the protective shell (21) being fixedly connected to a triangular piece (52), and a triangular groove (53) is provided on the triangular piece (52).

5. The electric vehicle charging pile with a connector suspension device according to claim 4, characterized in that: A driving shaft (54) is fixedly connected to the middle of the triangular member (52), a U-shaped plug-in member (55) is fixedly connected to the end of the driving shaft (54), a sliding member (56) is slidably connected in the triangular groove (53), the U-shaped plug-in member (55) is movably connected to the sliding member (56), and a transverse connecting rod (57) is rotatably connected to the outer end of the sliding member (56).

6. The electric vehicle charging pile with a connector suspension device according to claim 4, characterized in that: A vertical cavity (58) is fixedly connected to one side of the triangular piece (52), and an auxiliary supporting piece (59) is vertically slidably connected in the vertical cavity (58).

7. The electric vehicle charging pile with a connector suspension device according to claim 5, characterized in that: A convex piece (510) is fixedly connected to the middle of the driving shaft (54), a piston member (511) is fixedly connected inside the triangular member (52), a connecting pipe (512) is fixedly connected to the top of the piston member (511), and a cleaning ring (513) with a hole is fixedly connected to the end of the connecting pipe (512) away from the piston member (511).

8. The electric vehicle charging pile with a connector suspension device according to claim 2, characterized in that: The fastener (44) comprises a fastening plate and a sliding block fixedly connected to the upper end surface, and silicone is provided on a side of the fastener (44) for fastening the electric gun plug.

9. The electric vehicle charging pile with a connector hanging device according to claim 7, characterized in that: The triangular groove (53) comprises two oblique grooves and one vertical groove. The perforated cleaning ring (513) is designed as a cavity. A through hole is provided on the inner side wall of the perforated cleaning ring (513), and the through hole is communicated with the inner cavity thereof.

Images